A triangular prism on top of a rectangular prism. The rectangular prism has a length of 12 feet, width of 60 feet, and height of 12 feet. The triangular prism has 2 triangular sides with a base of 12 feet and height of 6 feet. 2 rectangular sides have a length of 8.5 feet and width of 60 feet. Choose the answers that make each sentence true. The surface area of the triangular prism without the shared base is ft2. The surface area of the rectangular prism without the shared base is ft2. If the exterior of the composite figure is being painted, the area to be painted is approximately ft2.